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In the recent decades, we have witnessed the rapidly growing popularity of location-based systems. Three types of location-based queries on road networks, single-pair shortest path query, $k$ <alternatives><inline-graphic xlink:type="simple" xlink:href="zhong-ieq1-2399306.gif"/></alternatives> nearest neighbor ( $k$<alternatives><inline-graphic xlink:type="simple" xlink:href="zhong-ieq2-2399306.gif"/> </alternatives>...
String similarity search is a fundamental operation in data cleaning and integration. It has two variants, threshold-based string similarity search and top-k string similarity search. Existing algorithms are efficient either for the former or the latter; most of them can't support both two variants. To address this limitation, we propose a unified framework. We first recursively partition strings...
Dictionary-based entity extraction has attracted much attention from the database community recently, which locates sub strings in a document into predefined entities (e.g., person names or locations). To improve extraction recall, a recent trend is to provide approximate matching between sub strings of the document and entities by tolerating minor errors. In this paper we study dictionary-based approximate...
The leap from single-core to multi-core has permanently altered the course of computing, enabling increased productivity, powerful energy-efficient performance, and leading-edge advanced computing experiences. Although traditional single-thread XPath query evaluation algorithms can run properly on multi-core CPUs, they cannot take full use of the computing resources of multi-core CPUs. To take advantage...
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